328 LXXV. COMPOSIT &. Souipaco. 
17. BOLTONIA. 
In honor of J. B. Bolton, author of “ Ferns of Great Britain,” &c., 1788. 
Heads many-flowered; ray flowers 9, in a single series, those of 
the disk tubular. $; scales in 2 series, appressed, with membranous 
margins; receptacle conic, punctate; achenia flat, 2 or 3-winged ; 
pappus of minute setze, 2 (—4) of them usually lengthened into awns. 
—2 Glabrous, branching herbs. Lvs. lanceolate, entire, sessile. Hds. 
loosely corymbose. Rays purplish-white. 
1. B. cuastiroxia. L’Her. 
Laws. lanceolate and oblanceolate, acute, tapering to the narrow base, lower 
ones sometimes serrate; Ads. on short peduncles, in a somewhat contracted 
corymb; branches leafy; ach. obcordate, conspicuously winged, pubescent, with 
2 awns nearly its own length.—Prairies and banks of streams, Il. Jenney! 
Penn. to N. Car. This plant resembles an Erigeron, but is very smooth, 3—6f 
high. Stem leaves 2—4’ by }—3?’; branch leaves of the same form but smaller. 
Rays about 30, expanding 9”. Jl. Aug. 
2. B. asterdives. L’Her. (B. diffusa. El/l.? Chrysanthemum Caroli- 
nianum. Walt.)—Lvs. linear-lanceolate, obtuse or acute, all entire, nar- 
rowed to the base, those of the branches subulate, minute; ids. on long pedun- 
cles, in a diffuse and loosely paniculate corymb; branches and branchlets very 
slender and nearly naked ; ach. ovate or somewhat obcordate, smooth, 2-awned.— 
Prairies, &c. Ia.! Ill. to Ga. and La. A very smooth plant, between an Aster 
and an Erigeron, with a diffusely branched summit, 3—7f high. Leaves 2—5’ 
or 6’ by }—3’, reduced upwards to setaceous bracts 1—2” in length. Heads 
terminating the filiform branchlets. Rays expanding 7’. Aug. Sept. 
Section 2. Heads radiate. Rays yellow. 
18. SOLIDAGO. 
Lat. solidari, to unite ; from the vulnerary qualities of the plants. 
Flowers of the ray about 5, 2, remote, of the disk %; involucre ob- 
long, imbricate, with appressed scales; receptacle punctate, narrow ; 
pappus simple, capillary, scabrous.—% Herbs, very abundant in the 
U. S. Stem erect, branching near the top. Lws. alternate. Hds. small, 
with 1\—15 (very rarely 0) small rays. F's. yellow (one species whitish), 
expanding in the autumnal months. 
§ 1. Stems much branched, corymbose. Leaves all linear, entire, sessile. 
1. S. nanceoLATa. Ait. Grass-leaved Goldenrod. 
St. angular, hairy, much branched; lvs. linear-lanceolate, entire, 3-veined, 
rough-margined, slightly hispid on the veins beneath ; corymds terminal, fasti- 
giate——In woods and meadows, Can. and U.S. Distinguished from most other 
species by its flat-topped corymb. Stem 2—4f high, with numerous, very long 
and narrow leaves, which are distinctly 3-veined and acutely pointed, smaller 
ones often fascicled in the axils. Flowers in terminal, crowded clusters. In- 
volucre ovate. The whole plant is fragrant. Sept. 
2. S. Tenuirouia. Ph. 
St. angular, smooth, with many fastigiate branches; dws. linear, spread- 
ing, obscurely 3-veined, scabrous on the margin, the axils leafy; corymb ter- 
minal, consisting of clustered heads; vays about 10, scarcely as long as the disk. 
—Meadows near the sea-coast, Mass.! to La. Also Wis. Dr. Lapham! Avery 
slender species, distinguished from 8. lanceolata by the extreme narrowness of 
- the leaves and the thinner, more open corymb, which is often reduced to a few 
heads. The leaves bear tufts of smaller ones in their axils, and are punctate 
with resinous dots, Aug.—Oct. 
§ 2. Stem simple, corymbose above. Lower leaves lanceolate, petiolate. 
3. S. rigipa. Hard-leaved Goldenrod. 
St. stout, rough and hairy; /vs. ovate-oblong, rough with minute hairs. 
